package pta_11_8;

public class A {
	public void hello() {
		System.out.print("hello");
	}
	public void aa() {
		System.out.print("aa");
	}
	public static void main(String[] args) {
		A a = new B();
		a.hello();
	}
}
class B extends A{

	public void bb() {
		System.out.print("bb");
	}
}